Here is the announcement from the official Sid Meier’s Civilization Facebook page:

Sid Meier’s Civilization Revolution 2 Plus for PlayStation Vita is now launching in North America and Europe on January 26, 2016. Meanwhile, 2K is launching the product as scheduled in Asia on December 3, 2015. We sincerely apologize for any inconveniences this may cause in light of the holiday season, but appreciate your patience as we continue to prepare the title for global release this coming year.

The delay does not come with a surprise as 2K Games has been very silent about Civilization Revolution 2 Plus since the announcement on October 30, 2015.